Malicious PDF — malware analysis report

Static analysis result for SHA-256 94bacddb91b87565…

MALICIOUS

PDF

62.5 KB Created: 2021-05-26 06:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ea28eb3e5f44d0fbd15bdae813cc6c9 SHA-1: 71b41c7832e8b09df4e7877db5cc1c9108e1a4c4 SHA-256: 94bacddb91b87565e1341a56c08aea8c44f4015763e2afc512169297138ab3fb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. The embedded URLs likely lead to further stages of the attack, such as downloading additional malware or redirecting to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8151

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://smidgel.ru/uplcv?utm_term=how+many+kuhli+loaches+should+be+kept+together
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/4e519a5b891e78a4a020697b935ce2ab/4516012904.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/e8nk8v81hg0lifrm49tdvo4mdn/32320370993.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ace2b0e204e---50703632797.pdf
    • http://matstravel.ru/userfiles/file/razepogofetutel.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609b50549b578---liwubeso.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/a9c4a998b7892515d0a0e8ddf62fb16e/pebilitozudifogasodidi.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcc528a641---21037501986.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607140f3d7681---70331722717.pdf
    • https://manuscripthandler.com/userfiles/file/31603604521.pdf
    • http://villa-carlshorst.de/sites/default/files/file/70988108408.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791e16e1124---balizolij.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a2978530ba9---67949600416.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-5-12/20210512012133165797.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609b83aac0550---rixezifugu.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/b10355fcb632483fefc10ca8a073314e/volakobewapowek.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ddca3036c---11483857393.pdf
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/24589168541.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d045.bin
e0a4a8eea475732355c9c331c0386deeb79ed52f159486f1cd7202752064a8b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD045 5848 bytes

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